Friction draft gear



Patented Jan'. V13, 1931` .Y HARRYF; WOENNLEY, or WILKINSBUNG, PENNSYLVANIA, ASSQ'IGNRQLBY iinisifny:"As-`` 1 SIGNMENTS, To GARDWELL wEsTINeHoUsn ,eoifrANn onenmAeo,*iLLINoisfA 1 oonPoRAmIoN oF. DELAWARE 4 FBieTioN DeAn'renAn;

This invention relates'to draftriggingjfor i railway Cars and' $11101@ Pertlalyioxffif ktion draft rigging Ifor :lisefe'epeoially in lpav's@V fsenger cars. f

f5 Thegprincipal objeetj-of myinyention is tojlorovide an improved dra-ft rigging ofy the above Itype 'which edeetively;eushion'or A dinary dlraitand,y buing forces'jin'eident 'to theoperationiof atrain ofnconpledearsbel '10 fore the; friction elementeV are Veaifsed j'to" opierate to 4cushion vextraordinaryl heavy-draft e0 the friction elements are causedto"operate;r

Y fand Fig.y 3v is adetail 'seetional yiew,r`takenon `"the line 3 3 of Fig.k 1"vshowing one of :the Afriction elements anchoredtoythe easing. I

VThe draft rigging shown in the drawing v25 may `Seoinlorisejalioll'erW` rectangular' casing l having `i'r'ont andiear [sections 2' Srel' spe'ctively, lWhielfi aresecured together by bolts Y4er any other des'iirednieans. j* Y l The. f iontjj'sectionv 2 ,contains alternated friction; Plates' 552111@ 6 Wh'ch-.eredispo'sed OBPOSte sides Offafwedgngfmehllism' the yplates 5 being Wedge-shaped fand anchored to the k section 2,`and the platesl yhaving par;- allel :fric-tion faces., ythere' being ,relative lon- 35 V gitndinal movement betweengtheplates "and 6 when' the rigging is subjected to secondary or extraordinarily heayy, `bu`inngfstresees or draft Stmnsi, Y Contained in thel Seetionfl are Springs'y and Q, ,therear ends vof v'Which Seatollial;ilioy-g;V 'ablevv 'spring seat ofrollower member' 10` havji ing a centralfportion which nornial/lyfe'xV tends through an lopening'ini-ii@ reame-1F12 a "Seoli'red to thei ydraft {sills ,usleiiffiifNonl gestegen?) f een, 2 The @was afeeprings and' ,9. seat'ona `flower 16 containedin'thesfeetion? 2 `ofE the easing, :which oll'joyver' engages'` therear'ends of the friction 'plates 6.

The weging `nacheinem cqmprises* ingi'-k i V.tndinallyi dipos'ed Wedge blocksl l?k (and: 18

having Opposed Wedeing .fcesfadivtedfw engage corresponding `Wedging 'fao'esfof Wedge Y:blocks/fili) and 120, the .outer f aces; eine'.

yyhiehjbloels 419 andy 2O engage theinner ltrici tion-plateS56l :The kouter end of the Wedge bleek. 1'( `abntsfa Viront "folloWerQ and hase rearwardly extendingstem`22 having any :opening i'orined'jftherein throgh which" a o looking key 23 v`passee, the ends off'said key vet o passing vthroughslotsfornied inf the top and berouw-311s -ofthesetion 2f Thezrar ein; of 4the Wedge bloeklS engagesy the 'follower lf3.'

nected to'theieasino 1,1underinitialConi-prel Theloekin'glkey isfor the purpoe'eof main-v taining vthe eeyeralp'arte off'the'rigging eon-` y v'70 r mnvemm in the" direction of its langer-epm 2 f gitiidinal bore1 in'tlieste'1n122" into locking en- 25 Contained in areeess formed inthe followerldi" f '1 *1" i when 'the draft rigging isl'in iis'vnrmei 're-:f

Vfziifis provided when extendslthrough'aeion; u

`gageinentwith the leyandi'isjmaintained Vsuch engagement by the pressureof a spring abiits Yreardraft Iugsi285` alllo'f Whielillugs; I. f

v u (not jvsliown) ofthe'ca'r inlthellisiial'lnanner, l 4

. "8'5" :In'o'peratiom when 'the draft rigging -issnba Y jected "to" draft st'rainfstransrnitted vthrough Y v attached-to the vshank `26 Will,- togethery i with and 'iishi'o'n'ordinaiy"seryce'fshocksincident tothe-pulling of the I cari; The 'initial fric tional ..-`reeis'tance I, o'i'ered byy-"the "Wedglng the follower member 10 is moved forward,

the casing .1 will be maintainedstationary.

n Should theA draft strain on the yoke 14 be'greater than can wholly be resisted by the pressure of the Springe 7., ,.8 .9 eeting' through the medium of the follower member v10, the rear follower 13 will engage rear end wallo12 of the casing and cause said casing,

Vtogether with the wedge-,shaped plates, to

move forward `as a unit, thus further com-v pressing the springs 8 and 9. It will here be Y noted that when the member 10 has been moved inwardly until the follower-13engages 1 the rear wall 12 of the casing, th e spring k7' Vwill not be compressed furtherl when the cas'- ing is moved forward.V As the casing and tleplate 5 aremoved forward and thesprings 8 9 compressed, the frictional resistance set up between the wedg'ing mechanism and the plates 5 .and 6 ,increased until the riggingv is fullyl compressed or ,the draft strains are cushioned. l In ,the'release movement of the draft :rigs ging the L combined pressures of :the springs 7 S Yand v9, actinguponlthe follower member 1.0, vcause-the 'member 10, ltogether with theV draft yoke 14ans rear follower 1 3 to move rearwardly relativetolthe casing 1 untilsuch time as vthemember 10 ,again Yengages .the .rear

wall 12of the casing, 'when the combined.V

pressures yof `the .springs V and 9 will l'cause thecasing, plates 5'spring 7,member .10 and Adraft yokelji to .move rearwardly las .a unit relativepto :the plates r6 and .wedging lmecha-` nism, until theVV rear follower 4 13 again abuts the rear draft luge 28! Thiemoveineiibo the casingand plates 5 and the relieving ofthe iiitessoiteofibe 'Series-e8 ood 9 permite-ibo wedeiligrmeohensmto assume its releeee fno-Y AYoo 4off ,theepring 7.

sitioniii' which the ili'oloomnfefesion, here-Y iiibefoljemeiitio oedegeiii rleeieie ibepereSofo Wien the das .rigging subjected' e,

' buiiing stresses or shocks transmittedfthrough y( the coupler shank 27 and front follower y21,

theWedgingfmeoberiiem frieiioil pleitos 5 eed 6 end easing -1- `Will Vbe moved rearwardly es e uoiteiid eefihe member 1,0 ie in abutment YWim-.tbe rear olloiier `13 :tbe greletive movementbetween nthe casing and-'member I,1Q fwillv cause-.tbe .springs .75:8e11d'9. folie empresse@ l tbiiscushioiiiiig Primery-fbuiiiosiebookslf the,biiiigzeiressee'orieboolie ereof eiiolilineg v riituele that 'they 1oeii11-ot lbe resisted by .the

' before deeoribed ,in

' draft strains. 'Y

pressure' ,of the springs the eeeiilgebjots the follower l', .eaiisiiig the :frieion eleiiieiitefio inoveiiito -euslioriiiig operation', 21S herein.- e'oiiiieeiioii with .beevy releasing-fthe .draft risginsfeftere seo:

Y endeiy or .extraordinary bloes-ebook, the

ooriibined pressure .ofthe Spill-figs 7f3 bei?) iiillieeuse '.tlie 4ofieiiig `l, Fletes 5.o.r1ol 6, end

wedgirigfmeebanism end ifloiiiffolloiveo, Y to nevel-foward iieliite i9; lieirbeiolos? .1.1192

' embodiment or otherwise lthan by the terms of the appended' claims. e y

Having now described my invention, what l1 'claimfa'slnew and desire to secure by Letteteletent, SIf* 1. In a: 'shock' absorbing mechanism, the combination with azcasingcomprising a for ward section-a nda rearQsfection, said sections being rigidlyConnected-together,of a follower loosely mounted inthe' rear end por l tion ofwbbe ree-ii Seetienrvof theA easing, e' spring interposed between andfengaging vsaid follower memberiandrthe ,rear portion of the forward sectionad'apted to cushion `primary draft ,and Y ,buiiir'ig shocks, :friction means mounted in. 'said forwardsection for cushion ing secondary `draft and bufhng shocks, a

follower plate loo'sely'mountedin Said forward-'section and engagingV said friction Ineens, ende emilie-interposed. between and eosesiiigfeeiil followers. fyieldabiy resisting relativefmovement Y betmveen said casing Aand friction *meanV in cus,hioningsecondaryi draft VKIn lafgsho'ck .absorbing mechanism, 'the combination with 'a basing, of a follower member loosely 1ii`o.1v1i1i;eii iiiltbe Areel end Portion of Aseid seeing, e' Spring interposed between ,and v[directly .engaging said follower meiiibereiid eeeiiiglediied to oliehiolo pri mary draft fand' buiiingf shocks, friction .cushioning means mounted in" the forward end of theV `casing for cushioning secondary dra-ft' and shocks, said friction cushioning Yineens'iooelodins" .longitudinallyiieovable liolefiesf la ,followerV ineiiibefY loosely mooiitedlin Seid eoSingendZ-eogesioe ibo ieiiler Y.enfle of said'plotee; .end e Spring illiterposed between andf engaging said follower iiieiiibero for'opposing i'elebiveEmoi/emeoi betweenfsaid ifriction means land casing when ,n

the :ebookebeorbilgioeebeniem ie subi-eeieol to' Seeboden' droit and .boiiing .Shocks- 3'.. VIn :a shock absorbing mechanism, the eombiiieiioii kwith casina of e ,follower in 'berllooeelyiiioiinted iiitbe'iteer .end oorsaidcasingia springinterposed beliieeoeiiiLdiieetW eiiegiig Seid follower ilo Veine-rv 'draft "and biiliiiisebooks; .ietion feliehoiiing melone. mounted' in ythe ,forward end fof `the casing Vfor cushionin'g vSelci'ondary olreffeid boiling oliookele -.:folleWeifme.rbbei looselymountedin 'the V forward end of the eelsioseril eiigegiirgI Seid friotioo ooebiooioe fieri eiieefieiefiioeesibewees eed iee vfriction cushioning means and casing in cushioning secondaryrk draft andbuiiing shofols,the:[irst mentioned spring being in-V effective to resist'said secondary draft and engaging both of said "follower members for Y opposing relative -movement between said buiiing shocks; Y Y

yhln a shock absorbing mechanism, the

.combination with a. casing, of a follower V member loosely mounted in the rear end portion of said casing, ra spring interposed between andV directly engagingfsaid follower memberand casing .adapted to cushion primary draft and buiing shocks, friction cushioning` means mounted in the forward end of the-casing for cushioning secondary draft and bungshocks, said friction cushioning vmeans"Y comprising longitudinally movable'friction plates, wedging means op-V erative to impress' lateralpressure onA said platesv when the lshock absorbingmechanism is subjected to secondary draft and buiing shocks, a follower vmember looselyk mounted i' .in 'the rforward end of the casing and 'en`- Y 25 wedging means, and:ajspringinterposed betweensaidfollower members opposing YVrelative movement of'said ycasing and friction gagingthe rear ends. of said. plates/and 

